<script>
import {mapState,mapGetters} from 'vuex'
export default {
  name: "Count",
  data() {
    return {
      n: 1, //选择的数字
    }
  },
  methods: {
    increment() {
      // this.$store.dispatch('add',this.n)
      this.$store.commit('ADD',this.n)
    },
    decrement() {
      // this.$store.dispatch('minus',this.n)
      this.$store.commit('MINUS',this.n)
    },
    incrementOdd() {
      this.$store.dispatch('addOdd',this.n)
    },
    incrementWait() {
      this.$store.dispatch('addWait',this.n)
    }
  },
  mounted() {
    console.log('Count组件挂载完毕,',this)
  },
  computed: {
    //借助mapState生成计算属性，从state中读取数据，对象写法
    /*...mapState({
      sum: 'sum',
      school: 'school',
      subject: 'subject'
    }),*/
    //借助mapState生成计算属性，从state中读取数据，数组写法
    ...mapState(['sum','subject','school']),

    /*sum() {
      return this.$store.state.sum
    },
    school() {
      return this.$store.state.school
    },
    subject() {
      return this.$store.state.subject
    },
    */

    //借助 mapGetters 生成计算属性，从getters中读取数据，数组写法
    ...mapGetters(['bigSum'])


    /*bigSum() {
      return this.$store.getters.bigSum
    }*/
  }
}
</script>

<template>
<div>
  <h1>当前求和为：{{sum}}</h1>
  <h3>放大十倍：{{bigSum}}</h3>

  <h3>我在{{school}},学习{{subject}}</h3>
  <select v-model.number="n">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <button @click="increment">+</button>
  <button @click="decrement">-</button>
  <button @click="incrementOdd">当前求和为奇数再加</button>
  <button @click="incrementWait">等一等再加</button>
</div>
</template>

<style scoped>

</style>